JP2002199092A - Portable telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable telephone set which regulates only communication with the outside such as an incoming call and a call even if the remaining quantity of the battery of the portable telephone set becomes less and can continuously perform an operation except for the above operation. SOLUTION: The remaining quantity detection parts of the portable telephone sets 10 and 11 detect the remaining quantity of the battery 109 and output detected remaining quantity to a control circuit 104. The control circuit 104 reads incoming call restriction information from a memory 112 when battery remaining quantity from the remaining quantity detection part 111 is not more than a setting value and transmits incoming call restriction information which is read to a service control station through an RF part 101 and an antenna 100. Then, the control circuit 104 reads a program stored in the memory 112 and sets the program for refusing a calling instruction inputted from a keyboard 103.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable telephone capable of maintaining functions other than a telephone call even when the remaining amount of a battery becomes low.

[0002]

2. Description of the Related Art Recently, portable telephones have become widespread.
And IT (Information Technology)
With the development of (logy) technology, a mobile phone has a function of transmitting and receiving mail, image data, music data, and the like in addition to the original call function, and its role as an information terminal device is increasing.

[0003] Such a portable telephone is equipped with a rechargeable battery and drives a circuit constituting the portable telephone.
When the remaining battery level is low, it becomes impossible to make a call, so that the remaining battery level is detected.

For example, Japanese Unexamined Patent Publication No. 6-6306 discloses a portable telephone which detects a remaining amount of a battery (battery) and emits a warning sound when the remaining amount becomes a predetermined value or less. That is, referring to FIG. 9, the mobile phone includes mobile phone main body 500 and battery pack 300. The mobile phone body 500 includes a conversion circuit 501,
Storage circuit 502, arithmetic circuit 503, control circuit 504
And a display unit 505. Also, the battery pack 300
Are the secondary battery 301, the detection circuit 302, the terminal 30
3,304.

[0005] The battery pack 300 is connected to the portable telephone body 50.
It supplies a voltage for operating 0. The detection circuit 302 detects the remaining capacity of the secondary battery 301. The power terminal 303 is connected from the secondary battery 301 to the mobile phone main body 5.
Terminal for supplying voltage to 00. Remaining output terminal 30
Reference numeral 4 denotes a terminal for outputting the remaining amount of the secondary battery 301 detected by the detection circuit 302.

[0006] Conversion circuit 501 of mobile phone body 500
Is a circuit that converts the remaining amount output from the remaining amount output terminal 304 into a digital signal that can be easily processed. Storage circuit 50
Reference numeral 2 denotes a nonvolatile storage circuit that does not lose stored contents even when the power is turned off. Arithmetic circuit 503
Is a circuit for calculating a digital value stored in the storage circuit 502 in advance and an output value from the conversion circuit 501.
The control circuit 504 includes a conversion circuit 501 and a storage circuit 502
And a circuit for controlling the operation of the arithmetic circuit 503.
The display unit 505 displays the output from the control circuit 504 as character information or numerical information. In addition, the storage circuit 50
Reference numeral 2 stores current consumption during standby and during a call.

In the conventional portable telephone shown in FIG.
The detection circuit 302 of the battery pack 300 detects the remaining amount of the secondary battery 301 and outputs the detected remaining amount to the conversion circuit 501 of the mobile phone main body 500 via the remaining amount output terminal 304. The conversion circuit 501 converts the received remaining amount into a digital value and outputs the digital value to the arithmetic circuit 503. Then, arithmetic circuit 503 calculates the remaining talk time based on the standby current consumption stored in storage circuit 502 and the digital value from conversion circuit 501, and outputs the remaining talk time to control circuit 504. Then, the control circuit 504 displays the remaining talk time from the arithmetic circuit 503 on the display unit 505 as character information.

[0008] Therefore, Japanese Patent Application Laid-Open No. 6-6306 discloses a technique for detecting the remaining amount of a battery and calculating and displaying the remaining talkable time from the detected remaining amount.

Japanese Patent Application Laid-Open No. 2000-196714 discloses that the remaining amount of a battery is detected, a talkable time is calculated from the detected remaining amount, and the talkable time is compared with a past average talk time. A mobile phone that informs a user whether or not a call is possible is disclosed. That is, referring to FIG. 10, the mobile phone includes mobile phone main body 600 and battery pack 700. The mobile phone main body 600 includes a timer setting unit 601, a remaining capacity detection unit 602, a callable time calculation unit 603, a call time calculation unit 604, an average call time calculation unit 605, a RAM 606, a ROM 607,
The control unit 608 includes a control unit 608, a notification unit 609, an LCD 10, and a speaker 611. The battery pack 700 includes a rechargeable secondary battery 701.

[0010] Timer setting section 601 sends an instruction to remaining capacity detecting section 602 to detect the remaining capacity of secondary battery 701 at each time set by control section 608. The remaining capacity detection unit 602 detects the remaining amount of the secondary battery 701 based on an instruction from the timer setting unit 601. The talkable time calculation unit 603 calculates a talkable time from the remaining amount of the secondary battery 701 detected by the remaining capacity detecting unit 602, and outputs the calculated talkable time to the control unit 608. The call time calculator 604 calculates a call time for each call.
The average call time calculation unit 605 calculates a new average call time based on the call time calculated by the call time calculation unit 604 and the average call time stored in the RAM 606. The RAM 606 stores the average call time calculated by the average call time calculation unit 605. Control unit 608
Compares the data of the talk time transmitted from the talk time calculation unit 603 with the data of the average talk time read from the RAM 606, and outputs the comparison result to the notification unit 609. The notification unit 609 notifies the state of the mobile phone main body 600 based on the remaining battery level by operating one of the connected LCD 610 and the speaker 611 or simultaneously operating both of them.

Therefore, Japanese Patent Laid-Open Publication No. 2000-19671
No. 4 discloses that the remaining talk time is calculated from the remaining battery power, and the calculated talk time is compared with the past average talk time to determine whether or not a call is possible with the remaining battery power. Has been disclosed.

[0012]

However, in the above-mentioned conventional portable telephone, the remaining amount of the battery is detected, the available time is calculated from the detected remaining amount, and the calculated available time is displayed. It is merely described. Then, normally, when the talkable time is exhausted, the function as the mobile phone is stopped.

[0013] Then, in a mobile phone, such as a recent mobile phone, which has a function of transmitting and receiving e-mail and the like in addition to the original call function, it is possible to view already received e-mail,
There is a problem that the telephone number of the other party stored in the memory cannot be searched.

Recently, a portable telephone has also functioned as a telephone number book. When the original telephone call becomes impossible, when the entire portable telephone is stopped, the telephone is registered from the telephone number registered in the portable telephone. A problem arises in that it is not possible to make a call from a public telephone to the called party by searching for the telephone number of the called party.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and its object is to provide only communication with the outside such as incoming calls and outgoing calls even when the battery level of the portable telephone becomes low. And a portable telephone capable of continuously performing other operations.

[0016]

SUMMARY OF THE INVENTION A portable telephone according to the present invention has a transmitting / receiving section for communicating with the outside, a battery for storing power required to drive each section, and a power supply from the battery. And generates a power supply voltage required to drive each unit and supplies the generated power supply voltage to each unit, a remaining amount detecting unit for detecting a remaining amount of the battery, and a key for receiving an instruction. An input unit and a control unit, the control unit receives the remaining amount of the battery from the remaining amount detection unit, compares the received remaining amount with a reference value, and when the remaining amount reaches the reference value, the transmission / reception unit Prohibits communication with the outside via the key input unit and executes an operation other than the communication with the outside according to the input instruction when an instruction to perform an operation other than the external communication is input via the key input unit. I do. The reference value is an amount of power that can perform an operation other than communication with the outside.

In the portable telephone according to the present invention, the remaining amount of the battery for storing the power for driving each unit constituting the portable telephone is compared with a reference value, and when the remaining amount reaches the reference value, communication with the outside is performed. , Power consumption of the battery is suppressed, and operations other than communication with the outside are continuously executed.

Therefore, according to the present invention, operations such as information processing in the portable telephone can be continuously performed even when the remaining amount of the battery becomes low.

Preferably, the control unit of the mobile phone controls the power supply unit to stop supplying the power supply voltage to the transmission / reception unit when the remaining amount of the battery reaches the reference value.
The supply of the power supply voltage to the transmission / reception unit is stopped.

When the remaining amount of the battery becomes low, the communication with the outside is prohibited by stopping the driving of the transmission / reception unit.

Therefore, according to the present invention, communication with the outside can be reliably stopped with a decrease in the remaining amount of the battery.

Preferably, the portable telephone further comprises a storage unit for storing incoming call restriction information for restricting incoming calls,
The control unit, when the remaining amount of the battery reaches the reference value, reads the incoming call restriction information from the storage unit, transmits the read outgoing call restriction information to the service control station via the transmitting / receiving unit, and via the key input unit. Reject incoming call instructions.

When the remaining amount of the battery reaches the reference value, the service control station for controlling the service of the portable telephone restricts the incoming call to the portable telephone which has transmitted the incoming call regulation information. Further, in the mobile phone, the communication with the outside is prohibited by rejecting the input calling instruction.

Therefore, according to the present invention, external communication can be prohibited by software.

Preferably, the portable telephone further includes a first storage unit for storing incoming call restriction information for restricting incoming calls, and a second storage unit for storing presence / absence of incoming call restriction notification. , The battery level reaches the reference value, and
When the incoming call restriction notification is stored in the second storage section, the incoming call restriction information is read from the first storage section, and the read out incoming call restriction information is transmitted to the service control station via the transmission / reception section. Reject outgoing call instructions entered via.

Therefore, according to the present invention, communication with the outside can be prohibited by software.

Preferably, the portable telephone further includes a display unit for displaying various information, and another storage unit for storing the telephone number of the other party, and the control unit controls the telephone number via the key input unit. Is input, a telephone number is searched from another storage unit, and the searched telephone number is displayed on the display unit.

Even when the remaining amount of the battery reaches the reference value, the registered telephone number is searched for and the searched telephone number is displayed.

Therefore, according to the present invention, the portable telephone can be used as a telephone directory even when the remaining amount of the battery is low.

Preferably, the other storage unit further stores a mail received from the outside via the transmission / reception unit,
The control unit searches for the mail from another storage unit in response to the mail display instruction input via the key input unit, and further displays the searched mail on the display unit.

Even when the remaining amount of the battery reaches the reference value, the already received mail is read out from the storage unit and displayed.

Therefore, according to the present invention, even if the remaining battery level is low, the user can know the contents of the already received mail.

Preferably, the control unit of the portable telephone displays a message prompting the battery to be charged on the display unit when the remaining amount of the battery reaches the reference value.

Therefore, according to the present invention, the user of the portable telephone can know that the remaining amount of the battery is low, and can immediately charge the battery.

Preferably, when the remaining amount of the battery reaches the reference value, the control unit of the portable telephone further reads a low remaining amount display indicating a low remaining amount of the battery from another storage unit, and displays the display on the display unit. indicate.

Therefore, according to the present invention, the user of the portable telephone can surely know that the remaining amount of the battery has become such that the user cannot talk.

Preferably, the portable telephone further includes an external output unit for outputting a sound signal to the outside, and a sound generating unit for generating a warning sound, and the control unit controls the remaining amount of the battery to reach a reference value. Then, the sound generation unit is further controlled to generate a warning sound, the warning sound generated by the sound generation unit is provided to the external output unit, and the external output unit outputs the warning sound to the outside.

When the remaining amount of the battery reaches the reference value, the portable telephone emits a warning sound. Therefore, according to the present invention, when the remaining amount of the battery reaches the reference value, the mobile phone emits a warning sound, so that the user of the mobile phone can know by hearing that the battery capacity is low.

Preferably, the battery of the portable telephone includes a main battery for storing power required to drive each unit during normal operation, and an auxiliary battery for performing operations other than communication with the outside, and a control unit. Controls the power supply so that the main battery is disconnected from the power supply when the remaining amount of the main battery reaches the reference value, and the auxiliary battery is connected to the power supply.

During normal operation, the main battery stores power for driving each unit, and a power source is supplied with power from the main battery to supply a power supply voltage to each unit. Then, when the remaining amount of the main battery reaches the reference value, electric power for performing an operation other than communication with the outside is supplied to the power supply from the auxiliary battery instead of the main battery.

Therefore, according to the present invention, by switching between the main battery and the auxiliary battery, operations other than communication with the outside can be continuously executed.

[0042]

Embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding portions have the same reference characters allotted, and description thereof will not be repeated.

Referring to FIG. 1, a network to which a mobile phone according to the present invention is connected will be described. Mobile phones (PHS (Personal Handyphone)
System)) 10 is connected to a digital network 50 via a wireless base station 20 and has a mobile phone (PHS) 11
Is connected to the digital network 50 via the wireless base station 21. The fixed telephones 40 and 41 are also connected to the digital network 50. The fixed telephone 41 communicates with the child device 42 in the area 32 wirelessly.

The digital network 50 includes mobile phone connection devices 51 and 52, exchanges 53 to 56, and a common channel signal network 57.
And a service control station 58. Radio base station 20
Establishes a wireless connection with the mobile phone 10 in the area 30. Then, the wireless base station 20
Is transmitted to the mobile phone connection device 51, and the mobile phone 10 is called based on the signal from the mobile phone connection device 51. Further, the wireless base station 21 establishes a line with the mobile phone 11 in the area 31 by wireless. Then, the wireless base station 21 transmits a signal from the mobile phone 11 to the mobile phone connection device 52, and calls the mobile phone 11 based on the signal from the mobile phone connection device 52.
The mobile phone connection device 51 receives a signal from the wireless base station 20, transmits the received signal to the exchange 53, and connects the wireless base station 20 and the exchange 53. The mobile phone connection device 51 transmits a signal from the exchange 53 to the wireless base station 20 to connect the exchange 53 and the wireless base station 20.

The connection device 52 for the mobile phone is similar to the connection device 51 for the mobile phone, and
4 is connected. When receiving the call from the mobile phone 10, the exchange 53 changes the telephone number of the other party to the common channel signal network 57.
If the other party's telephone is a mobile phone, it receives information on the exchange to which the mobile phone is connected from the service control office, connects to the exchange, and connects to the other party's telephone. Is a landline phone,
The information of the exchange to which the fixed telephone is connected is received from the service control station and connected to the exchange. When the exchange 53 receives a signal for calling the mobile phone 10 from the service control station 58 via the common channel signal network 57, the exchange 53 transmits the signal to the mobile phone connection device 51, and the fixed signal is transmitted from the service control station 58. When a signal for calling the telephone 40 is received, the fixed telephone 40 is called. The exchange 54 connects the mobile phone 11 or the fixed telephone 41 (or the slave 42) to the exchange to which the other party's telephone is connected in the same manner as the exchange 53. The service control station 58 holds telephone numbers, position information, and the like of the mobile phones 10 and 11.

In this way, the mobile phones 10, 11,
The fixed telephones 40 and 41 (or the child device 42) can make a call to the other party via the digital network 50.

The portable telephones 10 and 11 can transmit and receive various information such as mail, image data, and music data via the digital network 50 via the Internet.

Referring to FIG. 2, the configuration of mobile phones 10 and 11 according to the present invention will be described. Mobile phone 10,
Reference numeral 11 denotes an antenna 100, an RF unit 101, and a display unit 1.
02, a keyboard 103, a control circuit 104, a modem / channel codec 105, and an audio processor 10
6, a call microphone 107, a call speaker 108, a battery 109, a power supply unit 110, and a remaining amount detection unit 111.
, Memory 112, sound generator 113, speaker 11
4 is provided.

The antenna 100 is connected to the radio base stations 20 and 21
To send and receive signals wirelessly. RF unit 101
Demodulates a signal received via the antenna 100 into a baseband signal, and modulates a signal to be transmitted to give the signal to the antenna 100. The display unit 102 gives various information to the user as visual information. Keyboard 10
Reference numeral 3 denotes key input means for inputting a telephone number, character information, and various instructions. The control circuit 104 controls each component.

The modulator / demodulator / channel codec 105
π / 4 shift QPSK (Quadrature Pha
In addition to performing modulation processing and demodulation processing based on the "Shift Keying" method, PHS channel processing is performed. That is, the modem / channel codec 105 separates the audio signals of the users of the mobile phones 10 and 11 input from the microphone 107 and encoded by the audio processing unit 106 into discrete phases of the audio signals by π / 4. The modulation is performed by dispersing the signals in a distributed manner, and the modulated signal is output to the RF unit 101. That is, the modulator / demodulator / channel codec 105 sets (0, 0) to the 0 phase,
In a QPSK modulation system in which modulation is performed in correspondence with (0, 1) for π / 2 phase, (1, 0) for π phase, and (1, 1) for 3π / 2 phase, each phase is further π / 4. Shift,
(0,0) for π / 4 phase, (0,1) for 3π / 4 phase, 5π
Modulation is performed so that (1,0) corresponds to the / 4 phase and (1,1) corresponds to the 7π / 4 phase.

The modem / channel codec 10
5 is a π / 4 shift QPSK received by the antenna 100
An audio signal modulated by the system is received via the RF unit 101, and the modulated signal is demodulated to the audio processing unit 1.
06. Further, the modem / channel codec 105 establishes a link channel and a service channel as PHS channel processing. Link channel establishment refers to the protocol required for the next phase of call connection, using the control channel function consisting of the incoming and outgoing control channels to select the quality and capacity channels required for the call connection of each service. Means to select the type. In addition, service channel establishment uses the link channel function obtained by link channel establishment,
This refers to selecting a channel of a capacity necessary for providing a service and selecting a type of protocol required for a communication phase.

The audio processing unit 106 is a PCM (Pulse
An analog signal is encoded by a Code Modulation (Code Modulation) method and converted into a digital signal, and the converted digital signal is further converted to an ADPCM (Adaptive).
e Differential Pulse Code
(Modulation) method. In addition, the audio processing unit 106 uses the PCM system and the ADPCM
The digital signal modulated by the method is decoded and converted into an analog signal. The PCM method is a method in which an analog signal is sampled, sampled and quantized for each sample, and encoded into a digital signal. Also, AD
The PCM method predicts the value of a current input signal from a past input signal, calculates a difference between the values, and performs quantization so that quantization can be performed effectively even if the input signal greatly changes. The encoding is performed by increasing or decreasing the quantization level at the time of adaptation.

Therefore, the audio processing unit 106 encodes the analog audio signal from the telephone microphone 107 by the PCM system and the ADPCM system, converts it into a digital signal, and outputs it to the modem / channel codec unit 105. The audio processing unit 106 decodes the digital signal from the modulation / demodulation unit / channel codec unit 105, converts the digital signal into an analog signal, and outputs the analog signal to the speaker 108.

The telephone microphone 107 is connected to the mobile phones 10 and 1
An audio signal emitted by one user is input, and the audio signal is output to the audio processing unit 106. The call speaker 108
The audio signal decoded by the audio processing unit 106 is output to the outside, and the warning sound or ringtone generated by the sound generation unit 113 is output to the outside. Speaker 114
Outputs a warning sound or a ringtone generated by the sound generation unit 113 to the outside.

The battery 109 accumulates electric power necessary for driving each unit and supplies electric power to the power supply unit 110.
The battery 109 is detachable from the mobile phones 10 and 11. The power supply unit 110 generates a power supply voltage necessary for driving each unit based on the electric power from the battery 109, and supplies the generated power supply voltage to each unit. In addition, power supply unit 110 includes a battery charging circuit (not shown) for charging battery 109.

The remaining amount detecting unit 111 detects the remaining amount of the battery 109 and outputs the detected remaining amount to the control circuit 104. The memory 112 stores and holds programs for executing various functions of the mobile phones 10 and 11, various setting information, and a telephone directory in which the telephone numbers of the other parties are registered. The sound generation unit 113 generates a warning sound when the remaining amount of the battery 109 reaches the reference value under the control of the control circuit 104, and generates a ringtone when the control circuit 104 recognizes the incoming call. Speaker 11 for ringtone
Output to 4.

Referring to FIG. 3, an overall operation flow in mobile phones 10 and 11 will be described. The mobile phones 10 and 11 usually start from a standby state (step S1), and the control circuit 104 determines whether there is an incoming call (step S2). Then, when an incoming call is received, the mobile phones 10 and 11 shift to a mode of an incoming call process described later (step S3). When it is determined in step S2 that there is no incoming call, the control circuit 104
Determines whether an outgoing call instruction has been input via the keyboard 103 (step S4). The control circuit 104
When it is determined that the call instruction has been input, the mobile phone 1
0 and 11 shift to the transmission processing mode described later (step S5). When the control circuit 104 determines in step S4 that there is no transmission instruction, the mobile phone 1
0 and 11 shift to a battery remaining amount check mode (step S6) described later. Thereafter, the process returns to the standby state (step S1), and steps S2 to S6 are repeated.

Referring to FIG. 4, the operation of portable telephones 10 and 11 in the mode of the incoming call processing in step S3 of FIG. 3 will be described. When the incoming call processing starts, a link channel is established with the radio base stations 20 and 21 (step S20), and subsequently, a service channel is established (step S21). The control circuit 104 controls the memory 1
12 flag (FLG) stored in battery
Is determined as "1" or "0" (step S22). As described later, when the remaining amount of the battery detected by the remaining amount detecting unit 111 reaches the reference value, the battery remaining amount flag FL
G = 1 is stored in the memory 112, and when the remaining battery charge has not reached the reference value, the battery remaining charge flag FLG
= 0 is stored in the memory 112.

When detecting the flag FLG = 1 of the remaining battery level in step S22, the control circuit 104 regulates the incoming call. That is, the control circuit 104 controls the antenna 1
00 and the telephone number information of the caller received via the RF unit 101 is displayed on the display unit 102 (step S2).
3) The process proceeds to step S25. The control circuit 10
4 displays the telephone number information of the caller (step S23)
Then, the reason for rejecting the incoming call is notified to the sender (step S24), and the process proceeds to step S25. In this case, the control circuit 104 reads the incoming call rejection reason stored in the memory 112, and
And a caller via the antenna 100. Then, the control circuit 104 transmits the incoming call restriction information to the service control station 58 via the RF unit 101 and the antenna 100 (step S25), and ends the incoming call processing. As described above, by transmitting the incoming call restriction information for restricting the incoming call to the service control station 58 that controls the service to the mobile phones 10 and 11, the service control station 58 allows the mobile phone of which telephone number receives the incoming call. It is possible to recognize whether the call is regulated, and when there is an incoming call request from another portable telephone or fixed telephone to a portable telephone whose incoming call is restricted, the service control station 5
8 searches whether the telephone number of the called party is registered in the incoming call restriction, and when the telephone number of the called party is registered in the incoming call restriction, the service control station 58 rejects the connection of the telephone number to the mobile phone. I do. Thus, incoming calls to the mobile phone can be prohibited.

In step S20, the control circuit 104
When the battery level flag FLG = 0 is detected, the apparatus enters a normal call mode. That is, the control circuit 104
Based on the information received via the antenna 100 and the RF unit 101, the caller is specified, the caller's telephone number, name, and the like are displayed on the display unit 102, and the sound generation unit 113 generates a ringtone. Control. Then, the sound generation unit 113 generates a ringtone, transmits the generated ringtone to the speaker 114, and the speaker 114 outputs the ringtone to the outside (step S26). Thereby, the user of the mobile phones 10 and 11 can recognize the incoming call and the caller.

The control circuit 104 determines whether or not a key for receiving an incoming call has been input via the keyboard 103 (step S27). If no key has been input, the control circuit 104 proceeds to step S27 until a key is input. Is repeated. When the control circuit 104 determines in step S27 that a key has been input, the call is connected and a normal call is made (step S28). When the call ends, the incoming call processing ends (step S29).

Referring to FIG. 5, the operation of mobile phones 10 and 11 in the transmission mode of FIG. 3 will be described. When the transmission processing starts, the control circuit 104
It is determined whether the battery remaining flag FLG stored in 2 is “1” or “0” (step S40). Control circuit 10
4 detects the battery remaining amount flag FLG = 1,
Control is performed so as to emit a warning sound and display a warning (step S41). That is, the control circuit 104 controls the sound generation unit 113 to generate a warning sound, reads the warning display stored in the memory 112, and displays the read warning display on the display unit 102. Sound generator 113
Generates a warning sound and outputs it to the speaker 114, and the speaker 114 outputs a warning sound to the outside (step S4).
1). Then, the control circuit 104 ignores the transmission instruction input via the keyboard 103 and ends the process (S45).

When control circuit 104 detects in step S40 that battery remaining amount flag FLG = 0, it performs a normal transmission operation. That is, the control circuit 104 establishes a link channel with the radio base stations 20 and 21 (step S42), and subsequently establishes a service channel (step S43). The control circuit 104 converts the telephone number of the other party input via the keyboard 103 into the RF unit 1
01 and the antenna 100 (step S44). Then, the transmission process ends (step S4).
5).

Referring to FIG. 6, the operation of portable telephones 10 and 11 in the battery remaining amount check mode will be described. When the remaining amount check starts, the control circuit 10
4 determines whether or not the remaining amount of the battery input from the remaining amount detection unit 111 is equal to or less than a set value (step S50). In this case, the control circuit 104 holds the set value in advance. When the control circuit 104 determines that the remaining battery level is equal to or less than the set value, the control circuit 104 determines whether the remaining battery level flag FLG stored in the memory 112 is “1” or “0” (step S51). Battery remaining flag FLG is "1"
If so, the process ends (step S51). If the battery remaining amount flag FLG is “0”, the control circuit 10
4 controls to emit a warning sound and display a warning message (step S52). That is, the control circuit 10
4 controls the sound generation unit 113 to generate a warning sound, reads a warning message stored in the memory 112, and displays the read warning message on the display unit 102.
To be displayed. The sound generation unit 113 generates a warning sound and outputs the generated warning sound to the speaker 114, and the speaker 114 outputs the warning sound to the outside (step S52). And the control circuit 10
4 controls the power supply (step S53), sets the battery remaining amount flag FLG to "1", and stores the battery remaining amount flag FLG = 1 in the memory 112 (step S54).

Next, the control circuit 104 determines whether or not the incoming call restriction notification has been set (step S55). If the incoming call restriction notification has been set, the control circuit 104 notifies the incoming call restriction information. That is,
The control circuit 104 transmits the incoming call restriction information stored in the memory 112 to the service control station 58 via the RF unit 101 and the antenna 100 (Step S56). This restricts incoming calls to the mobile phones 10 and 11 and outgoing calls from the mobile phones 10 and 11. Thereafter, the process proceeds to step S62, and the battery remaining amount check ends. The routes in steps S51 and S62 are routes in a case where the remaining battery level has already become equal to or less than the set value and the remaining battery level flag FLG has been set to “1”. Further, the routes of steps S51 to S56 are routes when it is detected for the first time that the remaining battery power has become equal to or less than the set value.
In this case, since it is detected for the first time that the remaining battery power has become equal to or less than the set value, a warning sound and a warning message are issued (step S52).

If the remaining battery level is not equal to or smaller than the set value in step S50, control circuit 104 determines whether flag FLG of the remaining battery level stored in memory 112 is "1" or "0" (step S50). S57). If the battery remaining amount flag FLG is “0”, the control circuit 1
04 ends the process (step S62). If the battery remaining amount flag FLG is “1”, the control circuit 104
Deletes the warning message (step S58). Then, the control circuit 104 determines whether the incoming call restriction notification is set (step S59). If the incoming call restriction notification is set, the control circuit 104 releases the incoming call restriction to the service control station 58 via the RF unit 101 and the antenna 100. Send (Step S6)
0). Then, the control circuit 104 sets the battery remaining amount flag FLG to “0”, and sets the battery remaining amount flag FL to “0”.
G = 0 is stored in the memory 112 (step S61).
If the battery remaining amount flag FLG is “1”, the battery remaining amount flag is set to “0”, and the battery remaining amount flag FLG = 0 is stored in the memory 112. Then, the check of the remaining battery level ends (step S62).

Referring to FIG. 7, the operation of portable telephones 10 and 11 when a key input is made in the standby state will be described. When a key is input from the keyboard 103, the control circuit 104 determines a key input (step S70). That is, the control circuit 104 determines whether the key input is a key input for performing communication with the outside such as a transmission instruction. Keys for performing operations in the mobile phones 10 and 11, such as an operation of searching for a telephone number from the telephone number book stored in the memory 112 and an operation of displaying a mail stored in the memory 112 on the display unit 102. When the input is an input, the amount of power for performing the operation is smaller than the amount of power for performing communication with the outside.
In step 04, the process is continued according to the key input without determining whether the remaining battery level is equal to or less than the set value. Therefore, FIG. 7 is based on the assumption that a key input for performing communication with the outside is performed.

When the control circuit 104 determines that a key input for performing communication with the outside has been made, the memory 11
It is determined whether the flag FLG of the battery remaining amount stored in 2 is “1” or “0” (step S71). When the battery remaining amount flag FLG = 1, the control circuit 104 determines whether or not the operation instructed by the key input is an operation requiring the process to be restricted (step S72). That is, the control circuit 104 determines whether or not the operation instructed by the key input cannot be executed continuously with the remaining battery power less than the set value.

If the operation cannot be performed with the remaining amount of battery equal to or less than the set value, the control circuit 104 controls to emit a warning sound and a warning message (step S7).
3). That is, the control circuit 104 controls the sound generation unit 113 to emit a warning sound, and
, And displays the read warning message on the display unit 102. Also, the sound generator 113
Generates a warning sound and outputs it to the speaker 114, and the speaker 114 outputs a warning sound to the outside (step S7).
3). Thereafter, the process proceeds to step S75, and the key input process ends.

In step S71, when the battery remaining amount flag FLG is "0", or in step S7
In step 2, when it is determined that the operation can be performed with the remaining battery amount equal to or less than the set value, the process proceeds to step S74.
Then, the process designated by the key input is continuously executed (step S74), and the key input process ends (step S75).

In the above description, it is assumed that the means by which the mobile phones 10 and 11 restrict communication with the outside is to transmit the incoming call restriction information to the service control station 58 and to set the rejection of the transmission instruction in the program. However, the present invention is not limited to this, and the power supply unit 110 stops the power supply voltage supplied to the RF unit 101 when the remaining battery power detected by the remaining power detection unit 111 is equal to or less than a set value. You may do it. This prohibits the mobile phones 10 and 11 from communicating externally with hardware.

Further, in the above description, it has been described that a warning sound and a warning message are issued when the battery remaining amount becomes lower than the set value. However, the warning message indicates that the battery remaining amount becomes lower than the set value. In addition, a message prompting charging of the battery is also included.

Further, in the above description, it has been described that incoming and outgoing calls are regulated when the remaining battery power is less than a set value. Sending and receiving e-mails is also restricted. In other words, the present invention is characterized in that communication with the outside is prohibited when the remaining battery charge becomes equal to or less than the set value. The mobile phone 10 searches for a telephone number from the telephone number book stored in the memory 112 and displays it on the display unit 102, or displays mail already received and stored in the memory 112 on the display unit 102, Only operations that can be processed by only 11 are continuously executed.

In this case, a current of about 200 to 300 mA is usually required for communication with the outside, whereas a current of about 200 to 300 mA is required for performing an operation such as a search for a telephone number.
A current of about 20 mA is sufficient. Therefore, the set value set by control circuit 104 as the reference value is a voltage that is about 90% of the voltage when the battery is fully charged.

After the remaining battery power falls below the set value,
When a telephone number search instruction is input from the keyboard 103, the control circuit 104 reads the telephone number book stored in the memory 112, searches the read telephone number book for the searched telephone number, and performs the search. The displayed telephone number is displayed on the display unit 102. Therefore, the mobile phones 10, 1
The first user can search the telephone numbers registered in the mobile phones 10 and 11 even when the remaining amount of the battery 109 is low, and looks at the telephone numbers displayed on the display unit 102 and uses the public telephone. You can call the other party. As a result, the convenience for the user is improved.

When an instruction to display already received mail on the display unit 102 is input from the keyboard 103 after the remaining battery power has become equal to or less than the set value, the memory 1
12 is searched for, and the searched mail is displayed on the display unit 102. Therefore, the mobile phone 1
The users 0 and 11 can view the mails received and transmitted in the past even if the remaining amount of the battery 109 is low, and the user's convenience is improved.

The mobile phone according to the present invention is not limited to the mobile phones 10 and 11 shown in FIG.
0A and 11A may be used. Mobile phones 10A, 11
A is the one in which the battery 109 of the mobile phones 10 and 11 is replaced with a battery 1090, and the other is the mobile phone 1
Same as 0,11.

The battery 1090 is a main battery 1091
And an auxiliary battery 1092. Main battery 109
1 stores power for driving each unit of the mobile phones 10A and 11A during a normal operation, and supplies the stored power to the power supply unit 110. Also, the auxiliary battery 1092
Accumulates at least the electric power necessary for continuously executing operations performed only in the mobile phones 10A and 11A, such as searching for a telephone number.

Then, the remaining amount detecting unit 111 detects the remaining amount of the main battery 1091, and the control circuit 104 determines whether the remaining amount of the main battery detected by the remaining amount detecting unit 111 is equal to or less than the set value. The power supply unit 110 is controlled to switch the power supply from the main battery 1091 to the auxiliary battery 1092. Thus, by switching between the main battery 1091 and the auxiliary battery 1092, operations such as searching for a telephone number and displaying already received mail can be smoothly performed. Other details are the same as those described above.

In the above description, the search for the telephone number and the display of the mail have been described as the operations to be performed only on the portable telephone. However, the present invention is not limited thereto.
Display of image data, reproduction of music data, execution of game software, and the like may be performed.

According to the embodiment of the present invention, when the remaining battery power of the portable telephone falls below the set value,
Since communication with the outside is prohibited, a search for a telephone number registered in the mobile phone, a display of an already received mail, and the like are performed, the mobile phone can be used as a telephone directory even when the remaining battery level is low.

The embodiments disclosed this time are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description of the embodiments, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating a digital network to which a mobile phone according to the present invention is connected.

FIG. 2 is a schematic block diagram illustrating a configuration of a mobile phone according to the present invention.

FIG. 3 is a flowchart for explaining the overall operation of the mobile phone shown in FIG. 2;

FIG. 4 is a flowchart for explaining an incoming call process in the flowchart of FIG. 3;

FIG. 5 is a flowchart for explaining transmission processing in the flowchart of FIG. 3;

FIG. 6 is a flowchart for explaining a battery remaining amount check in the flowchart of FIG. 3;

FIG. 7 is a flowchart illustrating a key input process in the mobile phone illustrated in FIG. 2;

FIG. 8 is another schematic block diagram for explaining the configuration of the mobile phone according to the present invention.

FIG. 9 is a schematic block diagram illustrating a configuration of a conventional mobile phone.

FIG. 10 is another schematic block diagram for explaining the configuration of a conventional mobile phone.

[Explanation of symbols]

10, 10A, 11, 11A mobile phones, 20, 21
Wireless base station, 30-32 area, 40, 41 Fixed telephone, 42 slave unit, 50 digital network, 51, 52
Mobile phone connection device, 53-56 exchange, 57 common channel signal network, 58 service control station, 100 antenna, 101 RF unit, 102,505 display unit, 103
Keyboard, 104, 504 control circuit, 105 modem / channel codec, 106 audio processing unit, 1
07 call microphone, 108 call speaker, 114 speaker, 109, 1090 battery, 110 power supply unit, 111 remaining amount detection unit, 112 memory, 113 sound generation unit, 300, 700 battery pack, 301, 701
Rechargeable battery, 302 detection circuit, 303, 304 terminal, 500, 600 mobile phone main body, 501 conversion circuit, 502 storage circuit, 503 arithmetic circuit, 601 timer setting section, 602 remaining capacity detection section, 603 talk time calculation section, 604 call time calculation unit, 605 average call time calculation unit, 606 RAM, 607 ROM, 60
8 control unit, 609 notification unit, 610 LCD, 611
Speaker, 1091 main battery, 1092 auxiliary battery.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) H04M 1/2745 H04B 7/26 109K H04Q 7/04 DF term (reference) 5K027 AA11 BB04 BB17 FF14 FF22 GG04 GG08 HH11 HH14 MM17 5K036 AA07 BB11 DD16 DD25 DD46 JJ03 JJ07 JJ12 KK03 KK06 KK18 5K067 EE02 EE10 EE16 FF07 FF19 FF23 FF25 GG01 GG11 HH12 HH22 HH23 KK05

Claims (10)

[Claims] A transmitting / receiving unit for performing communication with the outside; a battery for storing power required for driving each unit; a power supply voltage required for receiving power from the battery and driving each unit; A power supply unit that generates and supplies the generated power supply voltage to each unit; a remaining amount detection unit that detects a remaining amount of the battery; a key input unit that receives an instruction; and a control unit, the control unit includes: Receives the remaining amount of the battery from the remaining amount detection unit, compares the received remaining amount with a reference value, and when the remaining amount reaches the reference value, performs communication with the outside via the transmission / reception unit. Prohibiting, when an instruction for performing an operation other than the external communication is input via the key input unit, performing an operation other than the external communication in accordance with the input instruction; Other than the above-mentioned external communication A power amount capable of executing, mobile phone. 2. The control unit controls the power supply unit so as to stop supplying the power supply voltage to the transmission / reception unit when the remaining amount of the battery reaches the reference value. The mobile phone according to claim 1, wherein supply of the power supply voltage to the transmission / reception unit is stopped. 3. A storage unit for storing incoming call restriction information for restricting an incoming call, wherein the control unit stores the incoming call restriction information in the storage unit when the remaining amount of the battery reaches the reference value. 2. The mobile phone according to claim 1, wherein the mobile phone reads out the incoming call regulation information from the mobile phone, transmits the read out incoming call regulation information to the service control station via the transmission / reception unit, and rejects the outgoing call instruction input via the key input unit. 4. A control device, further comprising: a first storage unit for storing incoming call restriction information for restricting an incoming call; and a second storage unit for storing presence / absence of an incoming call restriction notification. When the remaining amount reaches the reference value and the incoming call regulation notification is stored in the second storage unit, the incoming call regulation information is read from the first storage unit, and the read incoming call regulation information is read. The mobile phone according to claim 1, wherein the mobile phone transmits to the service control station via the transmission / reception unit, and rejects a call instruction input via the key input unit. 5. A display unit for displaying various information, and another storage unit for storing a telephone number of a call partner, wherein the control unit issues a telephone number search instruction via the key input unit. 4. The mobile phone according to claim 2, wherein, when is input, the telephone number is retrieved from the another storage unit, and the retrieved telephone number is displayed on the display unit. 5. 6. The another storage unit further stores an e-mail received from the outside via the transmission / reception unit, and the control unit responds to an e-mail display instruction input via the key input unit. The mobile phone according to claim 5, further comprising: searching for the mail from the another storage unit; and further displaying the searched mail on the display unit. 7. The control unit according to claim 1, wherein the control unit displays a message prompting charging of the battery on the display unit when the remaining amount of the battery reaches the reference value.
The mobile phone according to any one of the preceding claims. 8. The control unit, when the remaining amount of the battery reaches the reference value, further reads a low remaining amount indication indicating a low remaining amount of the battery from the another storage unit,
The mobile phone according to claim 7, wherein the mobile phone displays on the display unit. 9. An external output unit for outputting a sound signal to the outside, and a sound generating unit for generating a warning sound, wherein the control unit is configured to control when the remaining amount of the battery reaches the reference value. Controlling the sound generating unit so as to generate the warning sound, giving the warning sound generated by the sound generating unit to the external output unit, and the external output unit outputting the warning sound to the outside The mobile phone according to claim 7, wherein 10. The battery according to claim 1, wherein the battery includes: a main battery for storing power required to drive each unit during a normal operation; and an auxiliary battery for performing an operation other than communication with the outside. And controlling the power supply unit to disconnect the main battery from the power supply unit and connect the auxiliary battery to the power supply unit when the remaining amount of the main battery reaches the reference value. The described mobile phone.